Physics – Condensed Matter – Superconductivity
Scientific paper
2010-04-23
Physical Review Letters 105, 056402 (2010)
Physics
Condensed Matter
Superconductivity
5pages, 1 figure embedded
Scientific paper
10.1103/PhysRevLett.105.056402
We discuss electric transport through a point contact which bridges Majorana fermion modes appearing at edges of two helical superconductors. The contents focus on effects of interference and interaction unique to the Majorana fermions and role of spin-orbit interaction (SOI). Besides the Josephson current, the quasi-particle conductance depends sensitively on phase difference and relative helicity between the two superconductors. The interaction among the Majorana fermions causes the power-law temperature dependences of conductance for various tunneling channels. Especially, in the presence of SOI, the conductance always increases as the temperature is lowered.
Asano Yasuhiro
Nagaosa Naoto
Tanaka Yukio
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